Article: History of Applause

The link below is to an article that considers the history of applause.

For more visit:
http://www.theatlantic.com/technology/archive/2013/03/a-brief-history-of-applause-the-big-data-of-the-ancient-world/274014/

Article: History of Headphones

The link below is to an article that has a bit of a look at the history of headphones.

For more visit:
http://blogs.smithsonianmag.com/design/2013/03/a-partial-history-of-headphones/